scholarly journals Development of Heat Tolerant Two-Line Hybrid Rice Restorer Line Carrying Dominant Locus of OsHTAS

Rice Science ◽  
2021 ◽  
Vol 28 (1) ◽  
pp. 99-108
Author(s):  
Mehmood Jan ◽  
Gulmeena Shah ◽  
Huang Yuqing ◽  
Liu Xuejiao ◽  
Zheng Peng ◽  
...  
Keyword(s):  
Hybrid Rice ◽  
Restorer Line ◽  
Heat Tolerant

scholarly journals Comparative study of floral characteristics in the component lines of hybrid rice (Oryza sativa L.)

2014 ◽  
Vol 43 (1) ◽  
pp. 1-8
Author(s):  
MJ Hasan ◽  
Umma Kulsum ◽  
MH Rahman ◽  
A Akter ◽  
AKM Shamsuddin
Keyword(s):  
Oryza Sativa ◽  
Hybrid Rice ◽  
Oryza Sativa L ◽  
Floral Traits ◽  
Restorer Line ◽  
Hybrid Seed Production ◽  
Filament Length ◽  
Style Length ◽  
Maintainer Line ◽  
Anther Length

Significant variations were obtained among the component lines for most of the floral traits. BRRI9A exhibited superiority for angle of open florets, stigma length and breadth, anther breadth, filament length, style length and panicle exertion rate while its corresponding maintainer lines BRRI9B showed superiority for duration of open florets, stigma length and breadth, anther breadth and filament length. This indicated BRRI9A and its corresponding maintainer line BRRI9B possessed very good floral traits that influence out crossing. Among the restorer lines BR168R showed superiority for duration of open florets, angle of open florets, duration of bloomed florets/panicle, stigma length, anther length and number of pollen/microscopic focus. This suggested BR168R could be used as promising restorer line with BRRI9A for hybrid seed production in local condition.DOI: http://dx.doi.org/10.3329/bjb.v43i1.19739 Bangladesh J. Bot. 43(1): 1-8, 2014 (June)

Different response of an elite Bt restorer line of hybrid rice (Oryza sativa L.) in adaptation to nitrogen deficiency

2017 ◽  
Vol 39 (3) ◽  
Author(s):  
Yang Jiang ◽  
Lin Ling ◽  
Lingli Zhang ◽  
Abigail Domingo ◽  
Mingli Cai ◽  
...  
Keyword(s):  
Oryza Sativa ◽  
Hybrid Rice ◽  
Oryza Sativa L ◽  
Nitrogen Deficiency ◽  
Restorer Line ◽  
Different Response

scholarly journals Identification of Loss of Gene Function Phenomenon in Restorer Line and Its Mutant of Dian Type Hybrid Rice

2021 ◽  
Author(s):  
Tian Feng ◽  
Qian Zhu ◽  
Xiaoqiong Guo ◽  
Wei Li ◽  
Weilin Yu ◽  
...  
Keyword(s):  
Gene Function ◽  
Hybrid Rice ◽  
Restorer Line

scholarly journals Multivariate analysis in pollen parent (restorer line) of hybrid rice (Oryza sativa I.)

2011 ◽  
Vol 22 (2) ◽  
Author(s):  
MJ Hasan ◽  
Umma Kulsum ◽  
MH Rahman ◽  
A Akter ◽  
AKM Shamsuddin
Keyword(s):  
Multivariate Analysis ◽  
Oryza Sativa ◽  
Hybrid Rice ◽  
Pollen Parent ◽  
Restorer Line

Identification of rice blast resistance genes in the elite hybrid rice restorer line Yahui2115

Genome ◽  
2015 ◽  
Vol 58 (3) ◽  
pp. 91-97 ◽  
Author(s):  
Jun Shi ◽  
Deqiang Li ◽  
Yan Li ◽  
Xiaoyan Li ◽  
Xiaoyi Guo ◽  
...  
Keyword(s):  
Resistance Genes ◽  
Rice Blast ◽  
Hybrid Rice ◽  
Blast Resistance ◽  
Resistance Breeding ◽  
Restorer Line ◽  
Rice Blast Resistance ◽  
Linkage Marker ◽  
New Germplasm ◽  
Blast Resistance Genes

Rice blast, caused by the ascomycete fungus Magnaporthe oryzae, is one of the most serious rice diseases worldwide. We previously developed an elite hybrid rice restorer line with high resistance to rice blast, Yahui2115 (YH2115). To identify the blast resistance genes in YH2115, we first performed expression profiling on previously reported blast resistance genes and disease assay on monogenic lines, and we found that Pi2, Pi9, and Pikm were the most likely resistance candidates in YH2115. Furthermore, RNA interference and linkage analysis demonstrated that silencing of Pi2 reduced the blast resistance of YH2115 and a Pi2 linkage marker was closely associated with blast resistance in an F2 population generated from YH2115. These data suggest that the broad-spectrum blast resistance gene Pi2 contributes greatly to the blast resistance of YH2115. Thus, YH2115 could be used as a new germplasm to facilitate rice blast resistance breeding in hybrid rice breeding programs.

scholarly journals Genetic Diversity Of Some Restorer Lines For Hybrid Rice Development

1970 ◽  
Vol 36 (1) ◽  
pp. 21-28 ◽  
Author(s):  
MU Kulsum ◽  
MJ Hasan ◽  
H Begum ◽  
MM Billah ◽  
H Rahman
Keyword(s):  
Genetic Diversity ◽  
Principal Component Analysis ◽  
Genetic Divergence ◽  
Hybrid Rice ◽  
Principal Component ◽  
Component Analysis ◽  
Spikelet Fertility ◽  
Restorer Line ◽  
Panicle Length ◽  
Cluster Distance

Genetic divergence of thirty six restorer lines was studied through Mohalanobis’s D2 and principal component analysis for nine characters. Genotypes were grouped into five different clusters. Cluster III comprised of maximum number of genotypes (eleven) followed by cluster I and IV. The inter-cluster distance was maximum between clusters II and IV (14.064) indicating wide genetic diversity between these two clusters followed by the distance between cluster II and V (10.353), cluster III and cluster IV (8.588). The minimum inter- cluster distance was observed between cluster I and cluster III (2.885) followed by cluster I and cluster V (4.359) and cluster III and cluster V (4.825) indicating that the genotypes of these clusters were genetically close. The intra cluster distance in the entire five clusters was less, which indicated that the genotypes within the same cluster were closely related. Among the characters, number of tillers/hill, panicle length, number of filled spikelets/ panicle, spikelet fertility % and yield/plant contributed most for divergence in the studied genotypes. It indicates that these parameters can contribute more for yield in hybrid rice development.   Keywords: Rice; restorer line; genetic divergence; D2. DOI: http://dx.doi.org/10.3329/bjar.v36i1.9226 BJAR 2011; 36(1): 21-28

scholarly journals Genotypic variability for grain quality attributes in restorer lines of hybrid rice

Genetika ◽  
2020 ◽  
Vol 52 (3) ◽  
pp. 973-989
Author(s):  
Jamil Hasan ◽  
Umma Kulsum ◽  
Rani Majumder ◽  
Umakanta Sarker
Keyword(s):  
Grain Yield ◽  
Protein Content ◽  
Hybrid Rice ◽  
Cooking Time ◽  
Grain Weight ◽  
Restorer Line ◽  
Strong Positive Correlation ◽  
Thousand Grain Weight ◽  
Head Rice ◽  
Recovery Percentage

Twenty-six restorer line were selected for evaluation for genetic variability, heritability and genetic association among physicochemical, nutritional, yield and yield contributing traits in randomized complete block design (RCBD) with three replications. The analysis showed that restorer line has milling rice percentage, head rice recovery percentage, cooking time, elongation ratio, amylase content and protein content with average value among 26 genotypes (64.60%, 73,00%, 16.67 min, 1.38, 19.26% and 6.36% respectively). Highest grain yield was obtained from the restorer line 3038R (15.99 g/plant), followed by BRRI20R (14.83 g/plant), PR828R (14.10 g/plant), PR312R (13.91 g/plant), BRRI31R (13.61 g/plant) and BRRI19R (13.28 g/plant). The line BRRI20R and BRRI31R had high (25.00%) amylase and protein content, milling rice percentage, head rice recovery percentage. F2277R had less (14.00 min) cooking time. Grain yield exhibited a strong positive correlation with head rice recovery percentage, amylase content and thousand grain weight. Insignificant genotypic correlation was observed among physicochemical, nutritional, yield related traits and grain yield. Most of the studied traits indicating that selection with these traits might be possible without compromising any yield loss. Based on mean, range, genetic parameters, correlation coefficient and path coefficient values, direct selection through five traits i.e., head rice recovery percentage, cooking time, amylase content, protein content and thousand grain weight would significantly improve the grain yield of restorer line. Some of these restorer lines can be used for development of hybrid rice regarding these physicochemical, nutritional quality and yield related traits.

scholarly journals Genetic Diversity and Population Structure of the Parental lines of Hybrid Japonica Rice in Northern China Revealed by 8K SNP-Chips

2021 ◽  
Author(s):  
Hong Gao ◽  
Zuobin Ma ◽  
Yuanzheng Wang ◽  
Changhua Wang ◽  
Zhiqiang Tang ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Population Structure ◽  
Genetic Distance ◽  
Hybrid Rice ◽  
Northern China ◽  
Restorer Line ◽  
Rice Breeding ◽  
Blood Content ◽  
Parental Lines

Abstract BackgroundThe hybrid rice varieties have made a significant contribution to food security. Although there has been rapid development of hybrid indica rice variety, the development of hybrid japonica rice has been relatively slow. This study aimed to understand the genetic background of representative parental lines of hybrid japonica rice in northern China that were beneficial for increasing efficiency to find a superior breeding combination using a restorer line and a sterile line. ResultsWe selected 137 parental lines of hybrid japonica rice, including 90 restorer lines, 47 sterile lines, which broadly represented the recent rice breeding trends in China. These lines were genotyped using 8K SNP-Chips (China Golden Marker Biotechnology Co. Ltd.) to understand the genetic diversity, population structure, phylogenetic evolution, and indica blood content. The genetic diversity of total parental lines averaged 0.264, with values for the restorer line and sterility line as 0.287 and 0.148, respectively. Based on the model-based population structure analysis and distance-based clustering, these 137 lines were divided into 14 groups, including seven independent restorer lines groups and seven mixture groups. There were 70% restorer lines in the above-mentioned seven independent restorer lines groups, and the indica blood content was 0.348, while 30% restorer lines were genetically similar to the sterile lines and constituted the other seven mixture groups, where the indica blood content in the restorer lines and the sterility lines was 0.142 and 0.121, respectively. The results of distance-based clustering revealed that the restorer lines, Group 1 and Group 2 (containing only restorer lines), had longer genetic distances with groups containing mainly sterile lines (the genetic distance ranged from 0.672 to 0.788), which served as a potential heterotic for hybrid rice breeding. This observation was consistent with the breeding strategy of high yield hybrid japonica rice.ConclusionsThe typical japonica sterile lines were crossed with the restorer lines containing high indica components indicating a strong heterosis pattern was a feasible scheme for heterosis utilization of indica-japonica subspecies. Thus, the effective ways to further improve the rice quality of hybrid japonica rice in northern China included maintaining moderate genetic distance and indica components between the parental lines along with the excellent quality of both the parental lines.

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